Closure device



F. SCHlM PF CLOSURE DEVICE Filed June 4, 1955 2 Sheets-Sheet 1 of W;

' lrvvem F. SCHIMPF CLOSURE DEVICE Aug. 23, 1938.

Filed June 4, 1955 2 Sheets-Sheet 2 2 samw a Patented Aug. 23, 1938UNITE ST'l'fl rarer; OFFICE.

Hugo Schneider Aktiengesellschaft,

Germany Leipzig,

Application June 4, 1935, Serial No. 24,969 In Germany June 27, 1934Claims.

For double-walled evacuated insulating flasks of glass, use has alreadybeen made for closing the orifice of the flask of devices which are alsousual in the case of beer or mineral-water bottles 5 and which consistof a hinged closure member,

closing in a fluid-tight manner, and a detachable wire clip hold-downdevice or the like for hand operation. In the known constructions, thehold-down device is pivoted to the glass flask itself by its wire ends.This method of attachment has the disadvantage that it gives rise tobreakage of the glass. As a distinction therefrom and inter alia inorder to avoid the risk of breakage of the glass, the wire cliphold-down device is detachably or undetachably hingedly connecteddirectly or indirectly to the upper part of the casing of the insulatingflask.

Figure 1 of the accompanying drawings is a sectional drawing of aninsulating flask and shows a constructional example of such a closure.

Figure 2 shows the upper part of the insulating flask shown in Figure 1viewed from below.

Figure 3 shows in section the upper part of an insulating flask withanother constructional example of the closure.

Figure 4 shows the upper part of the insulating flask shown in Fig. 3viewed from below.

Figures 5 and 6 show in section and elevation, respectively, a furtherconstructional form of the closure.

Figures '7 and 8 show in section and elevation, respectively, anotherconstructional example.

Referring to Figs. 1 and 2, on the upper part I of the casing 2 of theinsulating flask are holding lugs 3 which are cut out of the wall of theupper part and bent up, and on which are hinged the ends of the wireclip hold-down device.

In the case of the example shown in Figs. 3 40 and 4, the ends of thewire clip hold-down device are connected indirectly and hingedly to theupper part of the insulating flask casing. The said ends engage holdinglugs. 3 of a supporting ring 4 disposed on the inside of the upper part,

45 which ring in the constructional example is in two parts and consistsof wire loops 4 secured in position by an edge beading 5 of the upperpart I. The holding lugs 3 are bent out of the same wire as the loopsand are passed from below 50 outwardly through holes in the wall of theupper part.

In the constructional example shown in Figs. 5 and 6, the ends of thewire clip hold-down device are again connected hingedly and indirectlyto the upper part of the insulating flask casing, but they engageholding lugs 3 of a supporting ring 6 screwed over the upper part I. Inthe constructional example shown in Figures 7 and 8 the indirectconnection of the hold-down device is effected by means of a wire loopprovided with holding lugs 3 and acting as a supporting ring, which wireloop rests in an external annular groove provided on the upper edge ofthe upper part i of the insulating flask casing. The wire loop Q may bedetachable or undetach- 0 able. It may also be made of a sheet metalring or the like.

A further improvement over the known devices Y mentioned at thecommencement consists in the diiferences in length of the wire clip ofthe 15 closure, which impair or destroy the effectiveness of theclosure, being rendered ineffective by using for the insulating flask aresilient bottom support device known per so. In this case, the wireclip hold-down device or the like is so 20 dimensioned that it stillpresses down the flask and the supporting device even if dilferences inlength of the wire clip of the closure are present to a certain extent.

In Figure 1 such a construction is shown by way of example. Theresilient bottom supporting device consists of the cork 1 and resilientwire spiral 8.

In the constructional example, the closure member 9 consists ofporcelain. The shape and the material of the closure member may also beselected differently, however, more particularly an extensivethermo-protective action may be taken into consideration.

For the hold-down device, sheet metal bands or the like may be employedinstead of the wires shown.

What I claim is:

1. The combination of a glass vacuum flask, an external casing for saidglass flask having in the lower part thereof a resilient bottomsupporting device for the flask and having in the upper part a reducedportion'for receiving a drinking cup and a closure member for closingthe flask in a fluid-tight manner with a hinge 5 connection forconnecting the closure member to said reduced portion of the externalcasing and a manually actuatable wire clip hold down device on saidreduced portion of the external 0 casing for securing the closure memberin the operative position said hinge connection and wire clip hold downdevice being connected to the reduced portion of the external casingbetween the periphery and the centre thereof, so as not to projectbeyond the periphery of said reduced portion.

2. The combination of a glass vacuum flask, an external casing for saidglass flask having in the lower part thereof a resilient bottomsupporting device for the flask and having in the upper part a reducedportion for receiving a drinking cup and a closure member for closingthe flask in a fluid-tight manner with a detachable hinge connection forconnecting the closure member to said reduced portion of the externalcasing and a manually actuatable wire clip hold down device on saidreduced portion of the external casing for securing the closure memberin the operative position said hinge connection and wire clip hold downdevice being connected to the reduced portion of the external casingbetween the periphery and the centre thereof, so as not to projectbeyond the periphery of said reduced portion.

3. The combination of a glass vacuum flask, an external casing for saidglass flask having in the lower part thereof a resilient bottomsupporting device for the flask and having in the upper part a reducedportion for receiving a drinking cup and a closure member for closingthe flask in a fluid-tight manner with a nondetachable hinge connectionfor connecting the closure member to said reduced portion of theexternal casing and a manually actuatable wire clip hold down device onsaid reduced portion of the external casing for securing the closuremember in the operative position said hinge connection and wire cliphold down device being connected to the reduced portion of the externalcasing between the periphery and the centre thereof, so as not toproject beyond the periphery of said reduced portion.

4. The combination of a glass vacuum flask, an external casing for saidglass flask and a closure device for closing the flask in a fluid-tightmanner, with a wire ring mounted on the upper part of the externalcasing, a hinge connection for connecting the closure member with theupper part of the external casing and a manually actuatable wire cliphold down device for securing the closure member in the operativeposition, said wire ring having lugs thereon for the attachment of thehinge connection to the upper part of the external casing and the holddown device for the closure member, said external casing having in thelower part thereof a resilient bottom supporting device for the flaskadapted to exert yielding pressure between the flask and the closuremember in the operative position of the wire clip hold down device.

5. The combination of a glass vacuum flask, an external casing for saidglass flask having in the lower part thereof a resilient bottomsupporting device for the flask, a closure member for closing the flaskorifice in a fluid-tight manner, a hinge connection for connecting theclosure member with the upper part of the external casing, a manuallyactuatable wire clip hold down device on the upper part of the externalcasing for securing the closure member in the operative position and asupporting ring having lugs thereon for the attachment thereto of thehinge connection and the wire clip hold down device for the closuremember, said supporting ring and the upper part of the external casinghaving oo-operating screw threads thereon for securing the supportingring to the upper part of the external casing.

FRANZ SCHIMPF.

